A certain glass window reduces the intensity level of the sound from 72 dB to 47 dB.By what factor is the acoustic power reduced by this glass window? A)3.2 × 10^-3 B)2.2 × 10^-2 C)5.6 × 10^-2 D)1.0 × 10^-1 E)1.5 × 10^-1

Question

Quizplus · Accepted Answer

The intensity level difference is 25 dB, which corresponds to a power reduction factor of 10^(25/10) = 3.2 × 10^-3.

A Certain Glass Window Reduces the Intensity Level of the Sound